User Guide
English
24 WILO SE 06/2011
• The pipes and pump must be free of mechanical stress when installed.
The pipes must be fastened in such a way that the pump does not
bear the weight of the pipes.
• The direction of flow must correspond to the direction arrow on the
pump housing flange.
• The bleed valve at the lantern (Fig. 7, Item 19) must always be pointed
upwards if the motor shaft is horizontal (Fig. 6/7). If the motor shaft is
vertical, any orientation is permitted.
• Any installation position is allowed except for “motor facing down”.
• The electronic module must not face downwards.
NOTE:
When pumping out a tank, ensure that the fluid level is always high
enough above the suction port of the pump so that the pump never
runs dry. The minimum inlet pressure must be maintained.
• When the pump is used in air-conditioning or cooling systems, the
condensation that forms in the lantern can be drained specifically via
an existing hole. A drain pipe can be connected at this opening. Small
amounts of fluid leakage can be also drained off.
NOTE:
In the case of insulated systems, only the pump housing may be insu-
lated, not the lantern or motor.
When isolating the pump, an isolation material without ammonia
compounds must be used in order to prevent stress cracking corro-
sion at the union nuts. If that is impossible, a direct contact with the
brass screws has to prevented, e.g. with stainless-steel screw con-
nections that are available as accessories. Another alternative is the
use of a corrosion protection tape (e.g. isolation tape).
7.3 Electrical connection NOTE:
The local requirements are to be taken into account.
Safety
CAUTION! Danger of property damage!
A volume flow going against or with the direction of flow (turbine
operation or generator operation) can cause irreparable damage
to the drive.
•
A non-return valve shall be installed on the pressure side of each
pump
.
DANGER! Danger of death!
A fatal shock may occur if the electrical connection is not made
correctly.
• Only allow the electrical connection to be made by an electrician
approved by the local electricity supplier and in accordance with
applicable local regulations.
• National Electrical Codes (NEC), local codes and regulations must
be striclty followed.
• Observe the installation and operating instructions for the acces-
sories!